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U ITED STATES PATENT Pricey.

I HENRY E. SHAFFER, OF ROCHESTER, NEW YORK, ASSIGNOR TO THE SHAFFER'LAMPCOMPANY, OF SAME PLACE.

LAM P.

SPECIFICATION forming part of Letters Patent No. 546,435, datedSeptember 17, 1895.

hpplicatiou filed July 18, 1894. Serial No.517,626. (N0 model.) I

To an whom it may concern:

Be it known that I, HENRY E. ,SHAFFER, of.

Rochester, in thecounty of Monroe and State of New York, have invented acertain new and useful Improvement in Lamps, of which the following is aspecification.

My improvement; relates to center-draft lamps; and the inventionconsists in the construction and arrangement of parts hereinafterdescribed and claimed.

In the drawings, Figure 1 is a central vertical section of the lamp.Fig. 2 is a crosssection of same in line mm of Fig. 1.

A indicates the fount, which may be of any desired form.

B is the base; 0, the burner, and D the wick-tube, the latter extendingsome distance below the fount, as shown. The wick rests outside thiswick-tube and is exposed directly to contact with the oil throughout thefount. a is the lower section of an exterior tube, and (1 an uppersection of such exterior tube. The lower section a extends from thebottom of the fount down as far as the lower end of the interior tube D,and is connected therewith so as to close the space between the twotubes and form a well or chamber below the bottom of the fount, whichwell or chamber receives the lower end of the wick, also oil from thefount. Said chamber stands outside the interior tube, by which means thewick extends in a straight length from bottom to top, thereby insuringfreedom of movement to the wick in moving up and down. The upper sectioncl of the exterior tube forms an integral part of the burner C, and isremovable with the latter from the top of the fount. In the drawings thelower end of the burner C is shown fitted removably in a circular flangeat the top of the fonnt. The section d is located at such a distancefrom the interior tube D that the wick passes loosely through the spacebetween the tubes, by which means it is moved freely up to supplycombustion,

and in applying the wick in place it is entirely.

removed from the lamp, leaving the whole space open, so that the wickcan be readily inserted over the interior tube and moved downward. Thespace between the lower section a and the interior tube is also of suchsize that when the wick is inserted in the lamp its lower end passesreadily down into the oil-chamber below the fouut. -By this constructionnot only is the wick readily inserted and removed, but by making thebreak in the exterior tube heat is prevented from passing downwardthrough said exterior tube. The advantages are obvious over those lampshaving two tubes extending entirely through the fount, in which case itis very diificult to insert the wick, and heat is conducted directlydown into the fount. This invention is equally applicable to thosecenter-draft lamps in which the upper tube-section d is removable fromthe top of the fouut independently of the burner C.

The exterior tube-section a. is provided with a bead p, and the tubularstem of the hollow base B is extended up to the bead, covering the lowerend of the wick-tube and secured thereto. Above the bead is a brace J,preferably having holes through its sides through which air can pass tocool the tube. In high lamps two beads may be used, the base extendingup to the first one and the brace extending upward from the second one.The tubes are secured to the base by solder or any other suitable means.The space of the tubes and fount covered by the brace J is imperforateand closed, and none of the air which passes through the brace passesupward into the lamp, but simply surrounds the tubes and fount andcirculates in the inclosed space and keeps the parts cool.

By the construction above described, the base simply incloses the lowerend of the oil and wick chamber, and the latter is exposed to cold airboth above and below the attachment of the base thereto and the use oftie rods and other complicated parts is avoided.

Having described my invention, I do not claim simply and broadly doubletubes extending below the bottom of the fount, nor do I claim doubletubes extending through the fount and inclosing the wick, but

YVhat I claim as new, and desire to secure by Letters Patent, is-- 1. Acentral draft lamp having an interior wick tube extending from theburning point to some distance below the fount, an exterior wick tube intwo sections, the upper section extending to the top of the interiortube and removable therefrom, the lower section extending from thebottom of the fount and connected with the interior wick tube to form awick and oil chamber below the fount, the two exterior wick tubesections being separated in the fount to directly expose the wick to theoil, and a hollow base havinga tubular stem embracing a portion of theexterior wick tube and secured thereto, the said exterior wick tubebeing exposed to the air above and below the tubular stem of the base,as herein shown and described.

2. A central draft lamp having an interior wick tube extending from theburning point to some distance below the fount, an exterior wick tube intwo sections, the upper section extending to the top of the interiortube and removable therefrom, the lower section extending from thebottom of the fount and connected with the interior wick tube to form awick and oil chamber below the fount, the two exterior wick tubesections being separated in the fount to directly expose the wick to theoil, the lower exterior wick tube being provided with a bead, andahollow base having a tubular stem embracing a portion of. the exteriorwick tube and abutting against the bead, the said exterior wick tubebeing exposed to the air above and below the tubu- Y lar stem of thebase, as herein shown and described.

3. A central draft lamp having an interior wick tube extending fromtheburning point to some distance below the fount, an exterior wick.tube in two sections, the upper section extending to the top of theinterior tube and removable therefrom, the lower section extending fromthe bottom of the fount and connected with the interior wick tube toform a wick and oil chamber below the fount, the two exterior wick tubesections being separated in the fount to directly expose the wick to theoil, a hollow base having a tubular stem embracing a portion of theexterior wick tube and secured thereto above the lower end thereof toexpose the lower end of the wick tube to the air, and an exterior braceabove the base joined at one end to the exterior wick tube and at theother to the fount, as shown and described and for the purposespecified.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses HENRY E. SHAFFER.

Witnesses:

R. F. OSGOOD,

A. J. ARMSTRONG.

